import React from 'react';
import { type MentionCandidate } from '../mentions.js';
export interface CommentComposerProps {
    /**
     * Called with the trimmed draft when the reader posts it. Absent when nothing can be
     * posted. May resolve to `false` to say the body did not land, which keeps the
     * draft in place for another try.
     */
    onPost?: (body: string) => void | Promise<boolean | void>;
    /** A post is in flight. */
    posting?: boolean;
    /** The last post did not land. */
    postFailed?: boolean;
    /** Who can be mentioned with `@`, agents first. Nobody, when absent. */
    mentionCandidates?: readonly MentionCandidate[];
}
/**
 * Where a new comment is written: a draft, the `@` mention picker over it, and the
 * Post button. Enter sends; Shift+Enter breaks the line.
 */
export declare function CommentComposer({ onPost, posting, postFailed, mentionCandidates, }: CommentComposerProps): React.ReactElement;